Aeu-International Journal of Electronics and Communications最新文献

英文中文

Low power memristor circuit with electronically Tunable

IF 3 3区计算机科学 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

Aeu-International Journal of Electronics and Communications

Pub Date : 2025-02-23 DOI: 10.1016/j.aeue.2025.155746

Fatih Saydam , Fırat Kaçar

This paper introduces a charge-controlled memristor emulator (MRE) circuit based on CMOS technology, utilizing the second-generation Current Controlled Current Conveyor (CCCII) as the active element. The proposed MRE circuit is designed as a grounded configuration, incorporating a resistor and a capacitor as passive elements. Mathematical analysis of the circuit was performed, and simulation studies using TSMC 180 nm technology and the LTspice program confirmed the expected pinch hysteresis curves characteristic of memristors. These curves were also obtained under various conditions and parameters to evaluate the circuit’s robustness. To this end, temperature analyses, process corner analyses, and Monte Carlo simulations were performed. The pulse signal response of the proposed circuit was examined, demonstrating its capability to perform in incrementing and decrementing modes. The circuit supports a maximum operating frequency of 150 MHz and features a low power consumption of 2.76 µW. Due to its nonlinear characteristics, proposed MRE is well-suited for chaotic applications. To illustrate this, the circuit was adapted to the Jerk system. Mathematical analyses of the proposed system were performed, and simulation studies in LTspice generated phase portraits that confirmed chaotic behavior. Finally, an experimental study has been realized to demonstrate to feasibility of the proposed MRE, by commercially available components, AD844 and AD633.

{"title":"Low power memristor circuit with electronically Tunable","authors":"Fatih Saydam , Fırat Kaçar","doi":"10.1016/j.aeue.2025.155746","DOIUrl":"10.1016/j.aeue.2025.155746","url":null,"abstract":"<div><div>This paper introduces a charge-controlled memristor emulator (MRE) circuit based on CMOS technology, utilizing the second-generation Current Controlled Current Conveyor (CCCII) as the active element. The proposed MRE circuit is designed as a grounded configuration, incorporating a resistor and a capacitor as passive elements. Mathematical analysis of the circuit was performed, and simulation studies using TSMC 180 nm technology and the LTspice program confirmed the expected pinch hysteresis curves characteristic of memristors. These curves were also obtained under various conditions and parameters to evaluate the circuit’s robustness. To this end, temperature analyses, process corner analyses, and Monte Carlo simulations were performed. The pulse signal response of the proposed circuit was examined, demonstrating its capability to perform in incrementing and decrementing modes. The circuit supports a maximum operating frequency of 150 MHz and features a low power consumption of 2.76 µW. Due to its nonlinear characteristics, proposed MRE is well-suited for chaotic applications. To illustrate this, the circuit was adapted to the Jerk system. Mathematical analyses of the proposed system were performed, and simulation studies in LTspice generated phase portraits that confirmed chaotic behavior. Finally, an experimental study has been realized to demonstrate to feasibility of the proposed MRE, by commercially available components, AD844 and AD633.</div></div>","PeriodicalId":50844,"journal":{"name":"Aeu-International Journal of Electronics and Communications","volume":"193 ","pages":"Article 155746"},"PeriodicalIF":3.0,"publicationDate":"2025-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143489003","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A high-gain, polarization-universal metasurface lens antenna for millimeter-wave communication 用于毫米波通信的高增益、极化通用元面透镜天线

IF 3 3区计算机科学 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

Aeu-International Journal of Electronics and Communications

Pub Date : 2025-02-22 DOI: 10.1016/j.aeue.2025.155727

Tianguo Yuan, Jiyang Xie, Xiaolin Yang

A novel structurally simple and symmetrical element for the design of polarization-universal metasurface (PUM) lens antennas is proposed, which demonstrates exceptional applicability for millimeter-wave communication. The PUM lens consists of four layers with circular patch components inserted in the outer ring distributing themselves periodically across the layers. The PUM’s phase shift is independent on the polarization feeding antenna since the symmetry of the element. The linear polarization (LP) and circular polarization (CP) antennas are used to verify the polarization versatility of the PUM. The simulated and measured results reveal that the PUM lens can increase the gain across the frequency band while maintaining the polarization of the antenna. The proposed PUM lens considerably reduces design complexity, which is suitable for the various communication applications.

引用次数: 0

High-efficiency wideband inductor-less platinum-band CMOS rectifier

IF 3 3区计算机科学 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

Aeu-International Journal of Electronics and Communications

Pub Date : 2025-02-22 DOI: 10.1016/j.aeue.2025.155737

Willy Jordan, Adel Barakat, Babita Gyawali, Ramesh K. Pokharel

This work introduces a novel approach to designing high-efficiency wideband high-power rectifier using 180-nm complementary metal–oxide–semiconductor (CMOS) technology. Unlike conventional rectifier design configuration, where inductors are needed for impedance matching, the proposed method employs an inductor-less design taking advantage of parasitic capacitance of auxiliary rectifier. This approach results in high efficiency at wide band for low frequency (50 MHz) until 1.4 GHz at the increased input power. Measurement results demonstrate outstanding power conversion efficiency (PCE) exceeding 40% and an output voltage surpassing 4V across the 50 MHz to 1.4 GHz range at 17 dBm input power (P_in). Furthermore, the peak PCE of 48.78% was achieved at a carrier frequency of 250 MHz.

引用次数: 0

Reconfigurable designs of equilateral triangular microstrip antennas for single and dual band circular polarized response in GSM and GPS applications

IF 3 3区计算机科学 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

Aeu-International Journal of Electronics and Communications

Pub Date : 2025-02-22 DOI: 10.1016/j.aeue.2025.155729

Amit A. Deshmukh, Aniruddh Viswanathan, Prasanna Nadkarni, Venkata A.P. Chavali, Heet Mistry

Reconfigurable designs of half U-slot cut equilateral triangular microstrip antenna are proposed for dual band circular polarized and wideband linear polarized response. With an optimum spacing in between TM_10h, TM_10v and TM₁₁ resonant modes of the slot cut patch, dual frequency response with axial ratio bandwidth of more than 3 % and peak gain of more than 4 dBic, is achieved. A design methodology is put forward that helps to realize similar dual band configuration as per specific wireless application.

引用次数: 0

Investigation of the effects of various parameters on wireless power transfer efficiency

IF 3 3区计算机科学 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

Aeu-International Journal of Electronics and Communications

Pub Date : 2025-02-21 DOI: 10.1016/j.aeue.2025.155723

Mert Yilmaz , Erdal Cetkin , Hakan Akca

Electric vehicles have dominated the automotive market, especially in recent years. However, the charging problem that stresses drivers continues. Although conductive charging is an established technology, it still needs to meet user expectations fully. On the other hand, wireless charging technology attracts users’ attention with dynamic charging features. Although this technology improves daily, efficiency is not at the desired level. In this study, a wireless power transfer system was designed for electric vehicles, and the factors affecting the charging efficiency were investigated. This system consists of an inverter, a compensation system, and a load. The efficiency of the system according to cable type, air gap, cooling, and pulse-width modulation parameters was observed through 40 experiments, each lasting 20 min. In addition to efficiency, the frequency behavior was also investigated. Experimental results were compared with models designed in MATLAB and ANSYS software. The average errors between the experimental and simulation results are 1.75, 2.03, 1.85, 1.58, and 2.00% for air gaps of 19–20, 55–56, 91–92, 127–128, and 145–146 mm, respectively. Power was transferred wirelessly with a minimum efficiency of 59.25% at a 145 mm air gap and a maximum efficiency of 85.74% at a 56 mm air gap in 300 W tests.

{"title":"Investigation of the effects of various parameters on wireless power transfer efficiency","authors":"Mert Yilmaz , Erdal Cetkin , Hakan Akca","doi":"10.1016/j.aeue.2025.155723","DOIUrl":"10.1016/j.aeue.2025.155723","url":null,"abstract":"<div><div>Electric vehicles have dominated the automotive market, especially in recent years. However, the charging problem that stresses drivers continues. Although conductive charging is an established technology, it still needs to meet user expectations fully. On the other hand, wireless charging technology attracts users’ attention with dynamic charging features. Although this technology improves daily, efficiency is not at the desired level. In this study, a wireless power transfer system was designed for electric vehicles, and the factors affecting the charging efficiency were investigated. This system consists of an inverter, a compensation system, and a load. The efficiency of the system according to cable type, air gap, cooling, and pulse-width modulation parameters was observed through 40 experiments, each lasting 20 min. In addition to efficiency, the frequency behavior was also investigated. Experimental results were compared with models designed in MATLAB and ANSYS software. The average errors between the experimental and simulation results are 1.75, 2.03, 1.85, 1.58, and 2.00% for air gaps of 19–20, 55–56, 91–92, 127–128, and 145–146 mm, respectively. Power was transferred wirelessly with a minimum efficiency of 59.25% at a 145 mm air gap and a maximum efficiency of 85.74% at a 56 mm air gap in 300 W tests.</div></div>","PeriodicalId":50844,"journal":{"name":"Aeu-International Journal of Electronics and Communications","volume":"193 ","pages":"Article 155723"},"PeriodicalIF":3.0,"publicationDate":"2025-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143489002","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Analysis and design of concurrent class-F2 power amplifier based on power-series technique

IF 3 3区计算机科学 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

Aeu-International Journal of Electronics and Communications

Pub Date : 2025-02-21 DOI: 10.1016/j.aeue.2025.155722

Jinting Liu , Weimin Shi , Yufeng Zang , Jun Hua , Gaoming Xu , Chunyu Hu , Ke Liu , Yu Li , Mingyu Li

Though the design procedures of dual-band power amplifiers (PAs) have been thoroughly studied in previous works, these studies have seldom delved into analyze the dual-band PA when it is driven by a concurrent dual-band signal. This paper presents the analysis and design of broadband class-F

_{2}

PA operating in concurrent mode. The class-F

_{2}

PA driven by a concurrent dual-band signal is analyzed using power series technique. It is illustrated that, compared to a concurrent class-B PA, the concurrent class-F

_{2}

PA exhibits an increased output power of 4.8 dB. Furthermore, when excited by a concurrent two-tone signal, the output power decrease of the class-F

_{2}

PA is merely 0.8 dB, as opposed to single-tone signal excitation. A broadband 1.8–2.2 GHz class-F

_{2}

PA supporting concurrent operation is designed and measured in this work. When excited by a single-tone signal, the broadband PA achieves a maximum output power of 41.1–42.4 dBm with a drain efficiency (DE) of 61.8%–67.3%. On the other hand, under the excitation of a concurrent two-tone signal centered at 2.0 GHz, the fabricated PA achieves an output power of 40.0–40.6 dBm with a DE of 60.0%–64.0% across a tone-spacing of 0–400 MHz.

{"title":"Analysis and design of concurrent class-F2 power amplifier based on power-series technique","authors":"Jinting Liu , Weimin Shi , Yufeng Zang , Jun Hua , Gaoming Xu , Chunyu Hu , Ke Liu , Yu Li , Mingyu Li","doi":"10.1016/j.aeue.2025.155722","DOIUrl":"10.1016/j.aeue.2025.155722","url":null,"abstract":"<div><div>Though the design procedures of dual-band power amplifiers (PAs) have been thoroughly studied in previous works, these studies have seldom delved into analyze the dual-band PA when it is driven by a concurrent dual-band signal. This paper presents the analysis and design of broadband class-F<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span> PA operating in concurrent mode. The class-F<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span> PA driven by a concurrent dual-band signal is analyzed using power series technique. It is illustrated that, compared to a concurrent class-B PA, the concurrent class-F<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span> PA exhibits an increased output power of 4.8 dB. Furthermore, when excited by a concurrent two-tone signal, the output power decrease of the class-F<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span> PA is merely 0.8 dB, as opposed to single-tone signal excitation. A broadband 1.8–2.2 GHz class-F<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span> PA supporting concurrent operation is designed and measured in this work. When excited by a single-tone signal, the broadband PA achieves a maximum output power of 41.1–42.4 dBm with a drain efficiency (DE) of 61.8%–67.3%. On the other hand, under the excitation of a concurrent two-tone signal centered at 2.0 GHz, the fabricated PA achieves an output power of 40.0–40.6 dBm with a DE of 60.0%–64.0% across a tone-spacing of 0–400 MHz.</div></div>","PeriodicalId":50844,"journal":{"name":"Aeu-International Journal of Electronics and Communications","volume":"193 ","pages":"Article 155722"},"PeriodicalIF":3.0,"publicationDate":"2025-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143464945","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A ramp-based background calibration technique for timing mismatch in time-interleaved ADCs

IF 3 3区计算机科学 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

Aeu-International Journal of Electronics and Communications

Pub Date : 2025-02-20 DOI: 10.1016/j.aeue.2025.155717

Yahan Yu , Peng Miao , Fei Li, Di Wang, Haotian Zhang, Ankang Ding

This paper presents a ramp-based background calibration technique for timing skew detection and correction in time-interleaved analog-to-digital converters (TI ADCs). The method achieves input independence through an internally generated ramp calibration signal. To enable the calibration to operate in the background without interrupting the ADC’s conversion process, a replica switch is integrated into each sub-ADC to sample the designated ramp signal. The comparator determines the sign of the timing skew by comparing the sampled values of the replica and reference switches. This technique is more efficient than traditional statistical-based algorithms and demonstrates more rapid convergence speed. Furthermore, contrary to algorithms utilizing FIR filters or reference ADCs, the simplified timing skew detection and correction circuit provides lower power consumption and hardware overhead. To validate the proposed technique, it was applied to a 12-bit, 2 GS/s, 4-channel TI ADC. Simulation results demonstrate the feasibility and accuracy of this calibration technique.

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引用次数: 0

Sequences design using orthogonal polynomials to mitigate side-lobes for MIMO radar and SAR imaging application 利用正交多项式设计序列，以减少多输入多输出雷达和合成孔径雷达成像应用中的边叶现象

IF 3 3区计算机科学 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

Aeu-International Journal of Electronics and Communications

Pub Date : 2025-02-20 DOI: 10.1016/j.aeue.2025.155724

Ankur Thakur , Naman Garg , Anshu Thakur , Davinder Singh Saini

Transmit radar sequences are designed for side-lobes mitigation in multiple-input multiple-output (MIMO) radar systems. This paper uses orthogonal polynomials to design sequences by varying the optimizing parameter

γ

to achieve significant bandwidth and minimal side-lobes simultaneously. Those polynomial orders are chosen which provide the wider bandwidth at optimal

γ

value. The value of

γ

has to be optimized for higher side-lobes reduction. In MIMO radar, the proposed Chebyshev orthogonal polynomial (COP) and Legendre orthogonal polynomial (LOP) sequences are analyzed with different numbers of transmitting antennas to mitigate peak side-lobe levels (PSL) and cross-correlation side-lobe levels (CCSL). Further, the least square estimate (LSE) and Capon estimate (CE) techniques are used to analyze the performance of the designed sequences for synthetic aperture radar (SAR) imaging applications. The proposed sequences effectiveness is compared to the counterpart methods for validation purposes.

{"title":"Sequences design using orthogonal polynomials to mitigate side-lobes for MIMO radar and SAR imaging application","authors":"Ankur Thakur , Naman Garg , Anshu Thakur , Davinder Singh Saini","doi":"10.1016/j.aeue.2025.155724","DOIUrl":"10.1016/j.aeue.2025.155724","url":null,"abstract":"<div><div>Transmit radar sequences are designed for side-lobes mitigation in multiple-input multiple-output (MIMO) radar systems. This paper uses orthogonal polynomials to design sequences by varying the optimizing parameter <span><math><mi>γ</mi></math></span> to achieve significant bandwidth and minimal side-lobes simultaneously. Those polynomial orders are chosen which provide the wider bandwidth at optimal <span><math><mi>γ</mi></math></span> value. The value of <span><math><mi>γ</mi></math></span> has to be optimized for higher side-lobes reduction. In MIMO radar, the proposed Chebyshev orthogonal polynomial (COP) and Legendre orthogonal polynomial (LOP) sequences are analyzed with different numbers of transmitting antennas to mitigate peak side-lobe levels (PSL) and cross-correlation side-lobe levels (CCSL). Further, the least square estimate (LSE) and Capon estimate (CE) techniques are used to analyze the performance of the designed sequences for synthetic aperture radar (SAR) imaging applications. The proposed sequences effectiveness is compared to the counterpart methods for validation purposes.</div></div>","PeriodicalId":50844,"journal":{"name":"Aeu-International Journal of Electronics and Communications","volume":"193 ","pages":"Article 155724"},"PeriodicalIF":3.0,"publicationDate":"2025-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143464946","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Maximizing secure communication in SWIPT-NOMA with SIC and CSI errors

IF 3 3区计算机科学 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

Aeu-International Journal of Electronics and Communications

Pub Date : 2025-02-20 DOI: 10.1016/j.aeue.2025.155740

V.Narasimha Nayak , Kiran Kumar Gurrala , Turimerla Pratap , K.Nageswara Rao

This article investigates the secrecy rate (SR) analysis of a new control-jamming (CJ) assisted SWIPT-NOMA network with decode-and-forward (DF) cooperative relaying subject to a total transmit power budget. Specifically, power-splitting (PS) protocol is employed at the relay for energy harvesting (EH). The harvested energy is utilized for transmitting information to users through a flat-Rayleigh-fading channel. Importantly, the network’s performance is investigated in terms of SR with successive interference cancellation (SIC) and channel-state-information (CSI) errors. To provide a comprehensive analysis, CJ is compared with various jamming conditions, which can secure the wireless transmissions against the eavesdropping. Further, the analytical expression for Ergodic SR is also obtained and confirmed through simulation. Moreover, A Particle swarm optimization (PSO) algorithm is utilized to determine the optimal power distribution among various nodes. The impact of critical parameters like transmit SNR and also the J-to-Eve and R-to-Eve distances on the level of secrecy are also analyzed. Finally, Monte-Carlo simulations validate that at a transmit SNR of 20 dB, the optimal power allocation (OPA) scheme under CJ achieves 12 % and 5 % improvement in SR at users U₁ and U_2. Additionally, CJ also effectively boost the network’s secrecy over other jamming cases under all CSI and SIC conditions.

{"title":"Maximizing secure communication in SWIPT-NOMA with SIC and CSI errors","authors":"V.Narasimha Nayak , Kiran Kumar Gurrala , Turimerla Pratap , K.Nageswara Rao","doi":"10.1016/j.aeue.2025.155740","DOIUrl":"10.1016/j.aeue.2025.155740","url":null,"abstract":"<div><div>This article investigates the secrecy rate (SR) analysis of a new control-jamming (CJ) assisted SWIPT-NOMA network with decode-and-forward (DF) cooperative relaying subject to a total transmit power budget. Specifically, power-splitting (PS) protocol is employed at the relay for energy harvesting (EH). The harvested energy is utilized for transmitting information to users through a flat-Rayleigh-fading channel. Importantly, the network’s performance is investigated in terms of SR with successive interference cancellation (SIC) and channel-state-information (CSI) errors. To provide a comprehensive analysis, CJ is compared with various jamming conditions, which can secure the wireless transmissions against the eavesdropping. Further, the analytical expression for Ergodic SR is also obtained and confirmed through simulation. Moreover, A Particle swarm optimization (PSO) algorithm is utilized to determine the optimal power distribution among various nodes. The impact of critical parameters like transmit SNR and also the J-to-Eve and R-to-Eve distances on the level of secrecy are also analyzed. Finally, Monte-Carlo simulations validate that at a transmit SNR of 20 dB, the optimal power allocation (OPA) scheme under CJ achieves 12 % and 5 % improvement in SR at users U<sub>1</sub> and U<sub>2.</sub> Additionally, CJ also effectively boost the network’s secrecy over other jamming cases under all CSI and SIC conditions.</div></div>","PeriodicalId":50844,"journal":{"name":"Aeu-International Journal of Electronics and Communications","volume":"193 ","pages":"Article 155740"},"PeriodicalIF":3.0,"publicationDate":"2025-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143471611","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A four-beam switchable cascaded cavity antenna loaded with bifunctional slots

IF 3 3区计算机科学 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

Aeu-International Journal of Electronics and Communications

Pub Date : 2025-02-18 DOI: 10.1016/j.aeue.2025.155721

Wenhao Wang, Liujia E., Jinwei Zhang, Zhonglei Mei

A cavity-cascaded antenna loaded with bifunctional slots and featuring four reconfigurable beams is proposed in this work. First, a compact trapezoidal cavity-cascaded antenna is realized using metallic vias. Then, three U-shaped slots are ingeniously etched onto the patch, serving the dual purposes of notch filtering and phase alteration, enhancing the antenna’s operational flexibility. Finally, diodes are loaded at the slot openings to realize the reconfigurable bifunctional slotas, and by controlling their operational states, the field distribution is regulated, resulting in four distinct directional radiation modes. A prototype capable of covering the WiFi 5.8-GHz band (5.725–5.85 GHz) was fabricated and tested. The experimental results reveal that the proposed antenna achieves a peak gain exceeding 8.65 dBi and a radiation efficiency above 88% within the operating frequency band. It is worth noting that, this antenna design distinguishes itself from existing pattern-reconfigurable antennas by its simplified structure and gteat functionality, driven by the innovative use of reconfigurable bifunctional slots.

{"title":"A four-beam switchable cascaded cavity antenna loaded with bifunctional slots","authors":"Wenhao Wang, Liujia E., Jinwei Zhang, Zhonglei Mei","doi":"10.1016/j.aeue.2025.155721","DOIUrl":"10.1016/j.aeue.2025.155721","url":null,"abstract":"<div><div>A cavity-cascaded antenna loaded with bifunctional slots and featuring four reconfigurable beams is proposed in this work. First, a compact trapezoidal cavity-cascaded antenna is realized using metallic vias. Then, three U-shaped slots are ingeniously etched onto the patch, serving the dual purposes of notch filtering and phase alteration, enhancing the antenna’s operational flexibility. Finally, diodes are loaded at the slot openings to realize the reconfigurable bifunctional slotas, and by controlling their operational states, the field distribution is regulated, resulting in four distinct directional radiation modes. A prototype capable of covering the WiFi 5.8-GHz band (5.725–5.85 GHz) was fabricated and tested. The experimental results reveal that the proposed antenna achieves a peak gain exceeding 8.65 dBi and a radiation efficiency above 88% within the operating frequency band. It is worth noting that, this antenna design distinguishes itself from existing pattern-reconfigurable antennas by its simplified structure and gteat functionality, driven by the innovative use of reconfigurable bifunctional slots.</div></div>","PeriodicalId":50844,"journal":{"name":"Aeu-International Journal of Electronics and Communications","volume":"193 ","pages":"Article 155721"},"PeriodicalIF":3.0,"publicationDate":"2025-02-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143473953","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

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Aeu-International Journal of Electronics and Communications

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